Applied Physics Letters · 1985 · 59 citations · 8 references
EngineeringMaterials SciencePhysicsOptoelectronicsSemiconductor DevicesSemiconductor MaterialsCarrier TransportLight-emitting DiodesOptical Properties Of SemiconductorsOptoelectronic MaterialsSemiconductor HeterostructuresSemiconductor PhysicsElectron-hole RecombinationHeterojunctionsHole TransportLight-emitting DevicesPhotoconductivityQuantum TransportSemiconductor HeterojunctionsTwo-dimensional Semiconductor Heterostructures
A negative photoconductivity is observed due to the two-dimensional (2D) holes at GaAs/Al0.5Ga0.5As heterojunctions under illumination by a red light-emitting diode below ∼6 K. The photoconductivity follows a nonexponential decay after the illumination is turned off. Quantum transport measurements are made to demonstrate explicitly that the photoconductivity is due to a decrease in the density and mobility of the 2D holes, and a model is proposed to explain the phenomenon.
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Energy Structure and Quantized Hall Effect of Two-Dimensional Holes
H. L. Störmer, Z. Schlesinger, A. M. Chang et al. · Physical Review Letters · 1983 · 339 citations